RRB Group D GK Questions 2026

A solar cell turns sunlight straight into electricity by the photovoltaic effect at a semiconductor junction, usually of silicon, so nothing inside it turns or slides.

Hydrogen has three isotopes: protium with one proton and no neutron, deuterium with one proton and one neutron, and tritium with one proton and two neutrons.

A whale is a mammal, not a fish, so it breathes with lungs and must come to the surface to take air through a blowhole on top of its head.

Article 17 abolishes untouchability and forbids its practice in any form. It sits in Part III among the Fundamental Rights, under the right to equality, and it is one of the few rights that works against ordinary citizens as well as against the State.

Ropar, the modern Rupnagar on the left bank of the Sutlej, was the first Harappan site excavated after Independence, and its trenches showed a sequence of occupation from the Harappan period through Painted Grey Ware to later historical levels.

The Punjab Vidhan Sabha is a single chamber house of 117 elected members, the strength fixed for the state after the reorganisation of 1966 and the delimitation that followed; Punjab has no Legislative Council.

Giddha, also spelt Gidda, is the women's folk dance of Punjab, danced in a ring to the clapping of hands and to boliyan, short verses sung by the dancers themselves.

On Baisakhi in 1699 Guru Gobind Singh, the tenth Guru, initiated the Panj Piare there and founded the Khalsa, giving it the five articles of faith.

Punjab was annexed by Lord Dalhousie at the close of the Second Anglo Sikh War, after the battles of Chillianwala and Gujrat, and the young Maharaja Dalip Singh was pensioned off.

It was Baisakhi day, and a crowd had gathered in the walled Jallianwala Bagh at Amritsar to protest against the Rowlatt Act and the arrest of local leaders.

The correct answer is B, Guru Ram Das, the fourth Sikh Guru, who founded the settlement around the sacred tank that gave the city its name.

Harike, also called Hari ke Pattan, was formed by a barrage built where the Beas joins the Sutlej, and it is the largest wetland of northern India.

Bhakra is a concrete gravity dam on the Sutlej in the Shivalik gorge at Bhakra, and the lake behind it is the Gobind Sagar.

The name Punjab joins the Persian words panj, five, and ab, water, for the land watered by the Sutlej, the Beas, the Ravi, the Chenab and the Jhelum.

Chandigarh was planned in the 1950s as the new capital of Punjab after Lahore went to Pakistan.

On that day the Punjab Reorganisation Act, 1966 came into force: Haryana was created as a separate state, the hill districts such as Kangra, Kullu and Shimla were transferred to Himachal Pradesh, and Chandigarh was made a Union Territory to serve as the capital of both Punjab and Haryana.

In 1643 the Italian scientist Torricelli filled a long glass tube with mercury and inverted it in a dish, and the column that stayed up showed that the air outside was pressing on the mercury; that apparatus is the mercury barometer, and the unit torr is named after him.

Babbage designed the difference engine and then the analytical engine, a mechanical machine with a store, a mill and punched card input, which carried every idea of a modern general purpose computer, and he is therefore called the father of the computer.

Working at the CERN laboratory in 1989, Berners-Lee proposed a system of linked documents and wrote the first web browser and server, giving the world HTML, HTTP and the address form known as the URL.

Chadwick showed in 1932 that the radiation given off when beryllium is struck by alpha particles consists of neutral particles of about the mass of a proton, and he named them neutrons; he received the Nobel Prize in Physics for it.